Tractor driving-gearing



51 F', PLSKL I'CT R. RIViNG GEARNG.

APPLICATION FILED JAN. le, |920.

@tamed Apu 20,1926.

2 SHEETS-SHEET 2.

nUNITED STATES PATENT FFCE.

HENRY I?. POLASKI, OF BIG RAPIDS, MICHIGAN, ASSIGNOR TO IFI-IE FOUR-DRIVE TRACTOR COMPANY, INC., O BIG RAIIDS, MICHIGAN.

TRACTOR DBIVING-GEARING.

Application filed January 16, 1920.

1. 0 al? iii/wm t may concern:

Be it known that I, HENRY P. PoLAsnr, a citizen of the United States, residing at Big Rapids, county of Mecosta, State oi lvlichi-gan, have invented certain new and useful Improvements in Tractor Driving- Grearing, oi which the following is a speciiication.

Third, to provide a .structure having the.

above named advantages in which the parts are simple and economical to manufacture and easily assembled and disassembled as occasion requires.

Further objects, and objects relating to structural details, will deli'nitely appear from the detailed description to follow.

l accomplish the objects of my invention by the devices and means described in the following speciiication. The invention is clearly defined and pointed out in the claims.

A structure which is a preferred embodiment of my invention is clearly illustrated in the accompanying drawing forming a part of this specification, in which:

Figure l is a detail vertical section of a structure embodying the features of my invention on a line .corresponding to line l--l of Fig. il, parts being shown in full lines for convenience in illustration.

Fig. ll is a detail vertical section on a line corresponding to line 2-2 of Fig. I with the parts shown in full lines for convenience in illustration.

ln the drawing similar reference characters refer to similar parts throughout the several views, and the sectional views are taken looking in the direction of the little arrows at the ends ot the section lines.

Referring to the drawing, 1 1 represents the supporting brackets or hangers on .the tractor trame, the frame not being illustrated as it forms no part oi this invention. 9-2 represent the vdriven axles. These provided with tubular housings 3 which Specification of Letters Patent.

Patented Apr. 20, 1920.

sei-iai No. 351,889.

are connected at their inner ends to the base member i oi' the differential gearing hous- 1ng, such base member having tubular ei;- tensions 5 in which the axle housings 3 are secured.

l The top member 6 of the differential housing 1s cylindrical in lorm and provided with an internal flange-like bearing member 7 at its top. The differential gearing comprises the driving member 8 having ournals 9 supported in bearings l0. The driven gears li are secured to the inner ends of the axles 2, the coacting planetary gears l2 rbeing carried by the driving memberl 8. lhe driving member S 1s provided with a diiterential driving gear i3.

I provide a cylindrical gear box l-lhaving a bottom l5 provided with a bearing portion or member 1G coacting with the bearing` member T at the upper end ot the differential housing. il retainino` ring 17 is secured on the under-side ot the bottom l5 to engage the bearing 7, thus retaining the parts in their assembled relation.

The top 1S oi the gear box is removable. The gear boi; has gudgeons 19 engaging the supporting brackets or hangers i.' The driving or propeller shaft 20 is disposed through one oi these gudgeons and has a bearing 2l therein. At its inner end, the driving shaft is supported by a bearing 22 mounted on a pedestal 23 on the bottom ot the gear box.

The driving shaft is provided with a beveled driving pinion meshing with the downwardly facing beveled gear 25 on the jack shaft 26. This jack sha-lit is supported by a bearing 27 in the top i8 the gear box and a bearing 28 in the bottom olf the gear bon. @n the lower end oit the ack shaft is a pinion 29 meshing with the dii'- ierential driving gear 13.

A thrust bearing 30 is arranged between the bearing member 7 ot the differential housing and the bottom ot the gear box. The flange Si on the gear box embraces the upper end ot the differential housing protecting this bearing 30 and preventing dirt m entering the di'tl'erential gear housing which is adapted as a lubricant receptacle. a filling opening 32 being provided at the front side thereof.V

The gear box is also adapted as a lubricant receptacle.v a :filling plug being provided in the top i8 and also a 'lilling plug f'-l llO being provided in the cover front gudgeon.

To supply lubricant to the upper bearing 27 of the jack shaft, the jack shaft`has a longitudinal bore 36 having a lateral opening 37 at its lower end through which the lubricant may enter from the gear box. A spirally grooved rod 38 depends into this bore so that as the shaft is revolved the lubricant is carried up and delivered above the bearing 27.

A brace extends from the frame to the stud 40 on the lower end of the differential gear housing. The rods 4l, shown in Fig. I, are also braced rods.

lVith this arrangement of parts, I secure a driving gearing for tractors and other heavy motor vehicles which is well adapted to withstand the severe strains and work to which it is subjected in use. It has the further advantage of being comparatively simple and economical in structure and very durable, the parts being accessible for renewal should occasion require.

I have not attempted to illustrate certain modifications which might be desirable in adapting my improvements to diierent tractors or motor vehicle structures as I believe the disclosure made will enable those skilled in the art to which my invention relates to embody or adapt the same as may be desired.

Having thus described my invention, what I claim as new and desire to secure by Let ters Patent, is:

l. In a structure of the class described, the combination of a pair of driven axles, housings therefor, a differential housing having a cylindrical upper portion with an internal flange-like bearing member at its top, a dierential driving gearing for said axles disposed within said differential housing and comprising a differential driving gear, a cylindrical gear box provided with supporting gudgeons, a removable top and a bottom having a bearing member coacting with said bearing member at the top of said differential housing and an annular flange embracing the upper end of said housing, a retaining ring secured to said gear box bottom to engage the under side of said bearing member, a thrust bearing disposed between the bottom of said gear box and said bearing member, a vertically disposed jack shaft projecting through the bottom of said gear box and having a pinion on its lower end meshing with said differential driving gear, bearings for said jack shaft on the plate 35 for the bottom and top of said gear box, a down-` wardly facing beveled driven gear on said jack shaft, a driving shaft disposed through one of said gear box gudgeons and provided with a driving pinion meshing with said driven gear on said jack shaft, a bearing for the inner end of said driving shaft mounted on the bottom of said gear box, said gear box constituting a lu bricant receptacle, said jack shaft having a longitudinal bore in its upper end opening into the gear box, and a spirally grooved rod mounted on the gear box top and depending into said bore for conveying lubricant to the upper bearing of said jack shaft.

2. In a structure of the class described, the combination of a pair of driven axles, housings therefor, a differential housing having a cylindrical upper portion with an internal flange-like bearing member at its top, a differential driving gearing for said axles disposed within said dierential housing and comprising a differential driving gear, a cylindrical gear box provided with supporting gudgeons, a removable top and a bottom having a bearing member coacting with said bearing member at the top of said differential housing and an annular flange embracing the upper end of said housing, a retaining ring secured to said gear box bottom to engage the under side of said bearing member, a thrust bearing disposed between the bottom of said gear box and said bearing member, a vertically disposed jacl; shaft projecting through the bottom of said gear box and having a pinion on its lower end meshing with said dierential driving gear, bearings for said jack shaft on the bottom and top of said gear box, a downwardly facing beveled driven gear on said jack shaft, a driving shaft disposed through one of said gear box gudgeons and provided with a driving pinion meshing with said driven gear on said jack shaft, and a bearing for the inner end of said driving shaft mounted on the bottom of said gear box.

3. In a structure of the class described, the combination of a pair of driven axles, a dierential housing having a bearing member at its top, a differential driving gearing for said axles disposed within said differential housing and comprising a differential driving gear, a gear box provided with supporting gudgeons and a bottom having a bearing member coacting with said bearing member at the top of said differential housing, a thrust bearing disposed between the bottoni of said gear box and said bearing member, a vertically disposed jack shaft projecting through the bottom of said gear box and having a pinion on its lower end meshing with said differential driving gear, bearings for said jack shaft on the bottom and top of said gear box, a driven gear on said jack shaft, a driving shaft disposed through one of said gear box gudgeons and provided with a driving pinion meshing with said driven gear on said jack shaft, a bearing for the inner end of said driving shaft mounted on the bottom of said gear box, said gear box constituting a lubricant receptacle, said jack shaft having a longitudinal bore in its upper end opening into the gear box, and a spirally grooved rod mounted on the gear box top and depending into said bore for conveying lubricant to the upper bearing of said jack shaft.

4. In a structure of the class described, the combination of a pair of driven axles, a differential housing having a bearing inember at its top, a differential driving gearing for said axles disposed Within said differential housing and comprising a differential driving gear, a gear box provided With supporting gudgeons and a bottom having a bearing member coacting With said bearing member at the top of said differential housing, a thrust bearing disposed between the bottom of said gear box and said bearing member, a vertically disposed jack shaft projecting through the bottom of said gear box and having a pinion on its lower end meshing with said dierential driving gear, bearings for said jack shaft on the bottom and top of said gear box, a driven gear on said jack shaft, a driving shaft disposed through one of said gear box gudgeons and provided with a driving pinion meshing with said driven gear on said jack shaft, and a bearing for the inner end of said driving shaft mounted on the bottom of said gear box.

In Witness whereof, I have hereunto set my hand and seal in the presence of two Witnesses.

C. A. WATSON, CLARENCE A. WA'rsoN. 

